package nowcoder;
/**
 * 三角形
 */
import java.math.BigDecimal;
import java.util.*;
public class Day27_2 {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        List<String> list = new ArrayList<>();
        while (input.hasNext()) {
            // 长整数的输入
            BigDecimal a = new BigDecimal(input.next());
            BigDecimal b = new BigDecimal(input.next());
            BigDecimal c = new BigDecimal(input.next());
            // 涉及长整数的运算
            BigDecimal add = a.add(b);
            BigDecimal cha = a.subtract(b).abs();
            String ret = (add.compareTo(c) > 0 && cha.compareTo(c) < 0) ? "Yes" : "No";
            list.add(ret);
        }

        for (int i = 0; i < list.size(); i++) {
            System.out.println(list.get(i));
        }
    }
}
